package com.sky.service.impl;

import com.alibaba.fastjson.serializer.BeanContext;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;


import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        //MD5 密码加密
        //加一次盐
        //password = password + username;
        password = DigestUtils.md5DigestAsHex(password.getBytes());


        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }





    /*
    * 新增员工
    *
    * */

    @Override
    public void save(EmployeeDTO employeeDTO) {
        //对象转换
        Employee employee = new Employee();
        //对象属性拷贝，调用BearUtils
        BeanUtils.copyProperties(employeeDTO,employee);
        //补全Employee中的属性
        //设置状态
        employee.setStatus(StatusConstant.ENABLE);//状态。0为禁用，1为启用
        //设置注册时间和修改时间
      /*  employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());*/
        //设置密码。默认值为123456，进行md5加密,调用PasswordConstant工具类
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置创建人id 和 修改人id
        //TODO 先定个假参数，等下在修改

        //获取 BaseContext中存入的id
      /*  employee.setCreateUser( BaseContext.getCurrentId());//创建人id
        employee.setUpdateUser(BaseContext.getCurrentId());//修改人id*/

        //调用Mapper层方法
        employeeMapper.insert(employee);
    }




    /*
    * 员工分页查询
    * */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        //调用mapper方法，把数据封装到集合中
        Page<Employee>page = employeeMapper.pageQuery(employeePageQueryDTO);

        //获取总记录数
        long total = page.getTotal();

        //获取当前页数据集合
        List<Employee> records = page.getResult();

        //前端需要的数据为total   records
        //把数据封装到PageResult实体类中，以josn形式返回
        return new PageResult(total,records);
    }




    /*
    * 员工账号启用禁用
    * */
    @Override
    public void startOrStop(Integer status, Long id) {
        //通过实体类调用builber方法，把id，status属性封装到实体类中
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        //调用mapper层接口
         employeeMapper.update(employee);
    }





    /*
    * 根据id查询
    * 回显数据
    *
    * */
    @Override
    public Employee getById(Long id) {
        //调用mapper层接口，获取实体类对象
        Employee employee = employeeMapper.getById(id);
        //设置密码，把密码进行脱敏处理
        employee.setPassword("****");
        return employee;
    }





    /*
    * 编辑员工信息
    * */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //获取员工类对象。
        Employee employee = new Employee();
        //进行属性拷贝,               起始        目标
        BeanUtils.copyProperties(employeeDTO,employee);
        //补全剩余属性
       /* employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        //调用mapper层方法
        employeeMapper.update(employee);
    }




}
